This is the 8185th most frequent German word.
intensiver
"More intensive" or "more intense."
In this sentence, 'intensiver' is used as a comparative form of the adjective 'intensiv', describing a stronger degree of engagement.
Wir haben uns dieses Jahr intensiver mit dem Thema Umweltschutz beschäftigt.
This year, we engaged more intensively with the topic of environmental protection.
Here, 'intensiver' serves to compare the intensity of the colors in this picture to those in other pictures.
Die Farben auf diesem Bild erscheinen intensiver als auf den anderen.
The colors in this picture appear more intense than in the others.
Using 'intensiver' in this context highlights the need for increased attention in the act of observing.